Electrically operated rotary paintbrush



G. DILLIN EUECTRICALLY OPERATED ROTARY PAINT BRUSH April 25, 1944.

Filed Aug. 20, 1941 2 Shets-Sheet 1 zl ll Gee/ye 1Q. 2/7/01.

April 25, 19.- G. IIR. DILLIN ELECTRICALLY OPERATED ROTARY PAI NT BRUSH 2 Sheets-Sheet 2 e/wtoc 6 zzm/m Patented Apr. 25, 194

NT. OFFICE hLE(J'IRJICALLY OPERATED ROTARY PAINTBRUSH v George R..Dillin, Charlotte, Mich- Application August 20, 1941, SerialNo; 407,691

3- Claims.

This invent-ion relates tdelectrically operated rotary paint brushes, andis intended to be usedin the same manner as an ordinary paint brush whereby paint is applied to any surface, the brush being carried by the-handof the painter.

It is an objectof this invention to save time of the painter otherwise devoted to dipping his brush in the paint pot'and transporting the receptacle containing the paint up a ladder. A fur ther object of this invention i the construction of a motor operated paint brush of especially simple mechanical construction which cannot get out of order in regular use, which can be manufactured cheaply, and which in customary work is subjected only to a minimum of wear.

In the accompanying drawings the special construction of this invention is illustrated, and Fig. 1 shows the casing in section with all the operating parts presented therein.

Fig. 2 is a detached cross sectional view of a brush shaft showing the brush and brush clamp thereon.

Fig. 3 represents a sectional view of the casing on the line 3-3 of Fig. 1 and showing the brush operating gears and the paint trough features.

Fig. 4 is a sectional view of the casing and tank on the line 44 of Fig. 3, showing also the paint pump and connections.

Fig. 5 is a fragmentary top view of the casing showing the usual construction, and the mouth of the paint tank.

Throughout the drawings and description the same number is employed to refer to the same part.

A selected form of casing or housing, usually made in several parts joined together as appears in Fig. 5, but of any desired shape, is carried by a handle I. Within the casing is placed an electric motor 2, also of any chosen form and character. The motor shaft 3 by bevel gears A and 5 revolves shaft 6 which in turn rotates by bevel gears l and 8 a main shaft 9 in bearings i3 and H upon the casing l2. For purposes of description the shaft 9 may be considered the driving shaft, and the square shaft 13 the joining shaft of the two carrier disks l4 and [5, which carry the plurality of brushes hereinafter mentioned. The square shaft I3 is tubular and rotates around shaft 9. Numbers l3 and I! refer to resilient clamping devices by which the brushes [8 are held upon their respective shafts 32 as illustrated in Fig. 2. Usually there are three line brushes is which extend along the shaft between the brush carrier disks I4 and I5.

As best shown in Figs. 1 and l, the mitre gears I3 and 23 drive the shaft 21 that terminates in an eccentric 22, the function ofv which is to force downwardly the spring controlled piston rod 23 of the paint pump 24. The pump receives paint from the paint tank 25 in the casing l2 and'is attached thereto. From pump 24 a tube 26 delivers paint to the dip trough 21, and it will be noted that adjacent to the trough the casing 12 has a paint applying opening 28 as best shown in the Fig. 3. Numbers 23 and. 33 refer to supports of any suitable structure for the trough, and 3| is the lidded mouth of the paint tank whereby it is provided with liquid paint.

In Fig. 1 will be noted the gear 33 concentrically next to the carrier disk i4, is borne by shaft '9.

Gear 33 is revolved by shaft 9 and has a slidable engagement with the shaft. This gear 33 may be detached and slid outwardly upon the shaft and the pitch of the brushes for various types of work may be changed. This is accomplished by turning the idler or planetary gears 34 and 35, whereupon the brush shafts and brushes thereon will be turned correspondingly. It will be understood that the disks M and it: are freely revoluble, and the gear 33 not only rotates the gears 34, 35 and fellow gears whereby the brushes are operated, but at the same time causes the rotation of the disks, thereby bringing the brushes successively to the paint applying opening 28. The gear 33 may be termed and considered'the driving gear for actuating the disks and brush gears.

' In the operation, believed to be made plain by the five figures of the drawings, the different brushes are turned by the motor first to dip them 1 into the paint trough, and then to move them so that each brush line one after another will be extended through the paint applying opening of the case and by Way of that opening the paint may be spread on any surface desired. The invention may be used exactly as painters work a hand paint brush of the usual sort. When this invention is simply held in the hand before being applied to a surface to be painted, the motor driven gear 33 actuates the radially disposed gears on the adjacent disk as shown in Fig. 3. As there are three sets of radial gears, or more, turning the brush shafts, some frictional resistance is encountered by the driving gear, and as the disksand square shaft turn freely, sufiicient force is engaged torotate the disks to dip the brushes as explained.

Having now described my invention, I claim:

1. A rotary paint brush, comprising a handle, a casing attached to the handle, a paint tank in the casing, a brush serving paint trough carried by the casing, means for conducting paint from the tank to the trough, a pair of revoluble brush carrier disk plates arranged opposite each other in the casing in spaced relation, a shaft having bearings upon the casing and constructed to support said carrier disks, an electric motor in the casing, shafting and gearing means whereby the said disks shaft is revolved by the motor, a plurality of brush members extending between the disks, each of said brush members having a revoluble shaft extending from one of said disks to the other disk, a driving gear concentric with the center of one disk, planetary gearing carried by the disk engaging said driving gear and arranged to rotate the brush shafts, the brush members being arranged to dip into said trough, vsaid casing having a paint applying opening, and the said brush members being arranged to be moved successively into the said opening to apply paint to an object by way of said opening.

2. A rotary paint brush, comprising a handle, a casing attached to the handle, a paint tank in the casing, a brush paint serving trough supported by the casing, a pair of revoluble brush carrier disk plates arranged opposite each other in the casing in spaced relation, a shaft having bearings upon the casing and constructed to support the said carrier disks, an electric motor in the casing, shafting and gearing devices whereby the said disks shaft is revolved by the motor, a paint pump in the casing having a spring controlled piston rod, gearing and shafting devices actuated by the said disks shaft and provided with an eccentric arranged to act upon the said piston rod of the pump, a paint tube connecting the paint pump and paint trough, a plurality of brush members extending between the disks, each of the said brush members having a revoluble shaft extending from one of said disks to the other disk, a driving gear concentric to one of said disks, planetary gearing carried by the disk and engaging the driving gear and arranged to rotate thebrush shafts, the brush members being constructed and arranged to dip successively into the said trough, the said casing having a paint applying opening, and the said brush members being adapted to be moved into the said opening to apply paint to an object by way of the opening.

3. In a rotary paint brush, a brush member having a revoluble brush shaft, the said brush extending lengthwise of said shaft, the said shaft having a longitudinal groove, and resilient means carried by the shaft and engaging the groove therein and constructed to clamp the brush member upon the shaft.

GEORGE R. DILLIN. 

